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校对: chapter2/03_Strings_and_Characters 方法名变化 (#921)

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index(of:) 已更名为: firstIndex(of:)
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Wentao Liu
2019-04-12 10:32:20 +08:00
committed by Jie Liang
parent 86690d4472
commit 9fd540b8d7
1 changed files with 1 additions and 1 deletions
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source/chapter2/03_Strings_and_Characters.md
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@ -434,7 +434,7 @@ welcome.removeSubrange(range)
```swift ```swift
let greeting = "Hello, world!" let greeting = "Hello, world!"
let index = greeting.index(of: ",") ?? greeting.endIndex let index = greeting.firstIndex(of: ",") ?? greeting.endIndex
let beginning = greeting[..<index] let beginning = greeting[..<index]
// beginning 的值为 "Hello" // beginning 的值为 "Hello"